1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 209Get this manual
BRAKE FLUID REPLACEMENTAIR LEEDING
BRAKE FLUID DRAINING
CAUTION
Do not aIow foreign material to enter the system when filling the reservoir void spilling fluid on painted, plastic or rubber partsPlace rag over these parts whenever the system is servicedWith the fluid reservoir parallel to the ground, remove the reservoir cover and diaphragm
Connect bleed hose to the bleed valveLoosen the bleed valve and pump the brake leverStop pumping the lever when no more fluid flows out of the bleed valve
BRAKE FLUID FILLING
Fill the reservoir with DOT or brake fluid from sealed container
CA UTION